DISEASES OF THE KERVOUS SYSTEM. 



403 



diseases, and the symptoms are not well marked, being those 

 usually presented by cerebral disturbances. 



HYSTEKIA. 



Hysteria is characterized by a highly nervous or excitable 

 condition. It is seen in all female animals. It is caused by some 

 change or excitement of the generative system. 



Symptoms. — The animal becomes excited to a great degree. 

 The pul?e runs away, the mare neighs continually, and in some 



Fig. 122— Hysteria. 



cases there is a kind of hiccough, caused by spasms. There is 

 usually a whitish or reddish colored discharge from the vulva. 

 Hysteria usually occurs about the time the animal comes in 

 heat; but it may, though rarely, occur in pregnant animals. The 

 symptoms will subside in a few days. The appetite is impaired, 

 and sometimes there is present urination. 



Treatment is not necessary. Opium, in ounce doses, or bro- 

 mide of potassium, in half-ounce doses, may be used. 



